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Investigation of the Cation Complexation by Macrocyclic Ethers using 13C NMR Spin--Lattice Dipolar Relaxation Time Measurements
Investigation the Cation Complexation Macrocyclic Ethers using 13C NMR Spin--Lattice Dipolar Relaxation
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2010/4/19
The binding constants (Ka) of [18]crown-6 ether with Na+ , K+, and Ba2+ thiocyanates were determined by 13C{1H} NMR spin--lattice dipolar relaxation time measurements. The observed relaxation times (T...
Electron Spin-Phonon Relaxation in Quantum Dots
Electron Spin-Phonon Relaxation Quantum Dots
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2010/10/22
We calculate the spin relaxation rates in parabolic quantum dots due to the phonon modulation of the spin-orbit interaction in presence of an external magnetic field. Both, deformation potential (DP) ...
Nonperturbative vibrational energy relaxation effects on vibrational line shapes
Nonperturbative vibrational energy relaxation vibrational line shapes
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2014/9/24
A general formulation of nonperturbative quantum dynamics of solutes in a condensed phase is proposed to calculate linear and nonlinear vibrational line shapes. In the weak solute-solvent interaction ...
Dielectric Relaxation in Glassy Se100 - x Sbx
Chalcogenide glasses Dielectric relaxation
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2010/4/12
Frequency and temperature dependence of dielectric constant \varepsilon' and dielectric loss \varepsilon'' are studied in glassy Se1-x Sbx (x = 0, 0.02, 0.04, 0.06, 0.08 and 0.10) in the frequency ran...
Postseismic relaxation driven by brittle creep: A possible mechanism to reconcile geodetic measurements and the decay rate of aftershocks, application to the Chi-Chi earthquake, Taiwan
postseismic relaxation Omori law Chi-Chi earthquake
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2014/4/15
We evaluate the effect of coseismic stress changes on the fault slip at midcrustal depth, assuming a velocity-strengthening brittle creep rheology. We show that this model can help reconcile the time ...
Modeling Relaxation Length and Half-Thickness of Wood by Method of Gamma Radiation
Relaxation Length Half-Thickness Value Gamma Radiation
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2010/4/12
Relaxation lengths and half-thickness values of different types of wood were determined using gamma radiation from 60C0 source. Results show that oxystigma (Oxystima spp) has the highest relaxation le...
Dielectric-Relaxation Spectroscopy of Kaolinite, Montmorillonite, Allophane, and Imogolite under Moist Conditions
Allophane Bound Water Complex Permittivity Dielectric-Relaxation Spectroscopy Imogolite Interfacial Polarization Kaolinite Montmorillonite Time-Domain Reflectometry
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2011/12/2
Abstract: The dielectric behavior of kaolinite, montmorillonite, allophane, and imogolite samples adjusted to a water potential of 33 kPa was examined using a time-domain reflectometry method over a w...
Relaxation oscillations and negative strain rate sensitivity in the Portevin - Le Chatelier effect
Relaxation oscillations strain rate Portevin - Le Chatelier effect
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2010/11/2
A characteristic feature of the Portevin - Le Chatelier effect or the jerky flow is the stick-slip nature of stress-strain curves which is believed to result from the negative strain rate dependence ...
XAFS study of the coordination and local relaxation around Co2+, Zn2+, Pb2+, and Ba2+ trace elements in calcite
XAFS coordination local relaxation trace elements calcite
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2012/3/31
Analysis of divalent Co, Zn, Pb, and Ba XAFS spectra of synthetic and natural calcite samples
containing trace concentrations of these heavy metals confirms their substitution in the unique Ca
site ...
Effects of bath relaxation on dissipative two-state dynamics
bath relaxation dissipative two-state dynamics
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2014/9/24
A formal solution to the two-state Liouville equations is used to derive quantum equations of motion for dissipative two-state systems without making the assumption of a harmonic bath. The first-order...
Energy Relaxation Rate of Hot Electrons in N-Type GaN Epilayers using Heat Pulse Techniques
Energy Relaxation Rate N-Type GaN Epilayers Hot Electrons
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2010/4/16
We have measured the energy relaxation rate of hot electrons in MBE grown bulk GaN epilayers on GaAs and sapphire substrates over the electron temperature range 1 - 130 K. The measurements were made u...
Well-width dependence of warm electron relaxation and interface roughness scattering in GaAs/Ga1-xAlxAs multiple quantum wells
two-dimensional energy-loss rates Shubnikov-de Haas
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2010/4/16
We review our recent results concerning the well-width dependence of the acoustic-phonon-assisted energy relaxation of two-dimensional (2D) warm electrons in modulation-doped GaAs/Ga1-xAlxAs multiple ...
87Rb NMR Relaxation and Vortex Dynamics in Rb3C60
87Rb NMR superconducting Vortex Dynamics
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2010/4/15
87Rb NMR relaxation measurements in superconducting fullerene Rb3C60 for various values of the external field are reported. In the normal state the results are in agreement with T1T= Constant. Below T...
NMR T1 relaxation study of 133Cs and 23Na adsorbed on illite
NMR T1 relaxation illite
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2012/3/31
23Na and133Cs NMR T 1 relaxation data for wet paste samples made from illite and either NaCl or CsCl solutions show that there is significant adsorption of the Na and Cs onto the surface. The Na and C...
Viscoelastic relaxation measurements in the system SiO2-NaAlSiO4 by photon correlation spectroscopy
Viscoelastic relaxation measurements system SiO2-NaAlSiO4 photon correlation spectroscopy
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2012/4/6
Relaxationtimesoflongitudinalstrainfor?vesupercooledliquidsalongthejoinSiO2(qz)-NaAlSiO (ne)includingthecompositionsofalbite(ab),ab jd ,jadeite(jd),jd ne ,4 50 50 66 33andjdne weremeasuredbyphotoncorr...